Being particular or picky about things (often food) — having strong preferences and rejecting what doesn't match them.
子どもが野菜を選り好みして食べてくれない。
The child is picky about vegetables and won't eat them.
仕事で選り好みをしているとチャンスを逃すことがある。
Being too choosy about jobs can cause you to miss opportunities.
彼は服に対して選り好みが激しい。
He's very particular about his clothes.